Jaw crusher



Oct. 20, 1964 H. H. POLZIN 3,153,512

JAW CRUSHER Filed Feb. 27, 1963 2 6 :pi: I 7

9 p a! in mu /w United States Patent 3,153,512 JAW CRUSHER Henry H.Polzin, Brooiriield, Wis, assignor to Aliishalmers ManufacturingCompany, Milwaukee, Wis. Filed Feb. 27, 1963, Ser. No. 261,326 6 Claims.Cl. 241-300) This invention pertains in general to a jaw crushingmachine and more particularly to the crushing plates and the means ofattaching same to the crusher jaws.

Extremely large forces are developed between the crushing surfaces ofthe jaw crusher and the material being worked upon. Because of theselarge forces the crushing surfaces wear and require replacement fromtime to time. To this end the crushing surfaces or wear plates arereleasably attached to the jaws of the crusher so they can be easilyremoved and replaced.

It has been found through experience that manganese steel is one of thebetter substances out of which to manufacture the wear plates because ofits ability to withstand the large forces developed. Manganese steel is,however, quite expensive and has a tendency to flow under the largeforces to which it is exposed in jaw crusher use. If the wear plates arenot permitted to flow, they will buckle and prematurely rupture, therebyconsiderably shortening the useful life of the plates. It is, therefore,necessary to connect the wear plates to the crusher jaws in a manner topermit this flowing of the manganese steel; however, it also isnecessary to rigidly connect the wear plates in a manner so that they donot shift bodily.

In view of the above requirements, it is a general object of thisinvention to provide a jaw crusher with wear plates wherein the platesare made in two sections and are rigidly connected to the crusher jawsso as to prohibit bodily shifting of either section, however, at thesame time to permit a flow of each individual plate section.

A further object of the subject invention is to provide a jaw crusher ofthe hereinbefore described type with two wear plate sections wherein theadjacent end of each section is forced into rigid engagement with aflange on the jaw mounting face and wherein opposite ends of eachsection are connected to the jaw mounting face in a manner to permitflow of each plate section.

These and other objects of the subject invention will become more fullyapparent as the following description is read in light of the attacheddrawing, wherein:

FIG. 1 is a cross section of a portion of a jaw crusher showing the wearplates attached to the crusher jaws; and

FIG. 2 is an enlarged partial cross section of the novel attachingmeans.

Referring to the drawing, it is the usual practice to provide onemovable jaw generally designated 6 and one stationary jaw generallydesignated 7. Stationary end covers 8 and 9 may be provided at thetransverse ends of the jaws to confine the material being worked uponbetween the crushing surfaces.

Each jaw 6 and 7 is provided with a mounting face 11 and 12,respectively, herein shown for purposes of illustration as being planefaces. Wear plates 13 and 14 are connected to the mounting faces 11 and12, respectively. Since each wear plate is connected to each mountingface in a similar manner, only the wear plate 14 connected to thestationary jaw 7 will be described. Furthermore, although theconfigurations of the wear plates 13 and 14 are diiferent, theseconfigurations do not form a part of the invention and are herein shownconcave and convex merely for purposes of illustration of one particulartype which may be utilized.

Wear plate 14 is constructed of two independent upper and lower sections16 and 17, respectively. Each plate section may be cast with voids 13 toreduce the cost of the plates. Here again it should be understood thatthese voids 18 do not form a part of this invention and are merely shownas a particular type of plate construction. The end surfaces of the ribs19 which define the voids 18 are machined to conform to theconfiguration of the mounting face 12.

The end surface 21 of plate section 16 has a numbe of spaced beveledgrooves 22 therein and the adjacent end surface 23 of plate section 17has an equal number of complementary oppositely beveled grooves 24therein. When assembled in position as shown particularly in FIG. 2,these complementary beveled grooves 22 and 24 form a series of wedgeshaped openings divided by Walls 26 and 27 of plate sections 16 and 17,respectively.

in accordance with the invention, a flange which may be in the form of achannel 28 is provided in the mounting face 12 substantially at thecentral portion thereof. Each wear plate section 16 and 17 is providedwith a cooperating flange means which in this embodiment are in the formof depending transversely extending lips 29 and 31, respectively. Theselips may extend the full transverse width of each wear plate section ormay consist of a series of spaced lips.

When the wear plate sections are positioned in place on the mountingface 12, the lips 29 and 31 fit into the channel 28 and the adjacent endsurfaces of the wear plate sections are spaced a slight distance fromone another as for instance the space indicated 32. Furthermore, eachwear plate section is provided with a series of spaced hal bores whichare alignable, when the plate sections are positioned for mounting tothe face 12, to define bores 33 concentric with the wedge openingsdefined by the beveled grooves 22 and 24. These bores 33 are also inalignment with through bores 34 in the jaw 7.

A wedge bolt generally designated 36 is passed through the bore 33defined by the half bores in each wear plate section and through the jaw7. A relatively heavy coil spring 37 may be provided between a pair ofspaced washers 38 and 39 encircling the portion of the bolt 36 on theside of the jaw opposite from the wear plate. The washer 39 bearsagainst the under surface of the jawand two nuts 41 and 42 may bethreaded onto the end of the bolt to pull the bolt into resilientholding engagement with the wear plate sections. The head of the bolt isconstructed in the form of a wedge 40 which is complementary to thewedge shaped opening so that as the bolt is pulled through the bores 33and 34 by a tightening of the nut 41, a spreading force is exerted oneach wear plate section forcing the lips 29 and 31 into engagement withthe side walls of the channel 28. Such a connection provides a verysolid attachment of each wear plate section to the mounting face so asnot to permit any bodily shifting of either wear plate section.Furthermore, this type of connection permits easy removal of either wearplate section when it is necessary for replacement.

An additional series of bores 43 and 44 are provided adjacent the remoteends of each wear plate section. These bores are alignable with bores 46and 47, respectively, in the crusher jaw 7. A mounting bolt 48 is passedthrough the bores 43 and 46 and is provided with a spring 49 and nuts 51and 52 similar to the arrangement provided for the wedge bolts 36. Abolt 53 is also utilized in the same type of connection in the remoteend of wear plate section 17. it should be noted that the bores 43, 46and 44, 47 have a larger diameter than the diameter of the shankportions of the bolts 48 and 53, respectively. This permits each wearplate section to flow outwardly from the rigid connection between thelips 29 and 31 and the channel 28.

It can be seen from the above description that a very solid connectionhas been provided between the wear 7 plate sections and the mountingface of the crusher jaws,

however, one which permits easy removal of the wear plates. platesections; it is possible to replace only that section which needsreplacement due to an excessive amount of wear.

Although only one embodiment of the subject invention has been hereinshown and described, it will be apparent to those skilled in the artafter reading this description, that other modifications are possiblewithout departing from the spirit of the invention and it is intendedthat all such modifications as come Within a reasonable interpretationof the appended claims be covered.

Having now'particularly described and ascertained the nature of my saidinvention and the manner in which it is to be performed, I declare thatwhat I claim is:

1. In a jaw structure fora crushing machine a support member having amounting face thereon; a pair of Wear plate sections positioned on saidmounting face and having spaced oppositely beveled grooves in theadjacent end surfaces thereof, said beveled grooves being in facingalignment to form wedge shaped openings; first flange means on saidmounting face defining a line substantially parallel to said endsurfaces of said wear plates; cooperating flange means on each of saidwear plate sections; and tapered locking means connected to said supportmember and engaging said beveled grooves to hold said plate sections tosaid support and force said cooperating flange means into engagementwith said first flange means.

Furthermore, by providing two individual wear 7 2. In a jaw structurefor a crushing machine a support member having a mounting face thereon;a pair of wear plate sections positioned on said mounting face andhaving spaced oppositely beveled grooves in the adjacent end surfacesthereof, said beveled grooves being in facing alignment to form wedgeshaped openings; first flange means on said mounting face defining aline substantially parallel to said end surfaces of said wear plates;cooperating flange means on each of said wear plate sections; taperedlocking means connected to said support member and engaging said beveledgrooves to hold the adjacent ends of said plate sections to said supportand force said cooperating flange means into engagement with said firstflange means; andholding means connecting the remote ends of said platesectionsto said support in a manner to permit limited flow of said wearplate sections on said mounting face.

3, The jaw structure of claim 2 wherein said locking 5 means and saidholding means are spring biased to resiliently connect said wear platesections to said support.

4-. In a jaw structure for a crushing machine a support member having amounting face thereon; a first Wear plate section having spaced beveledgrooves in one end surface thereof; a second wear plate section havingspaced beveled grooves in one end surface thereof, said wear platesections being positioned on said mounting face with said beveledgrooves infacing alignment to form spaced wedge shaped openings; groovemeans in said mounting face defining a line substantially parallel tosaid end surfaces of said Wear plate sections; depending lip portions onthe underside of each of said wear plate section extending into saidgroove means; and tapered locking means connected to said support memberand engaging said beveled grooves to hold said plate sections to saidsupport and force said lip means into engagement with said groove means.

5. In a jaw structure for a crushing machine a support member having amounting face thereon; a first wear plate section having spaced beveledgrooves in one end surface thereof; a second wear plate section havingspaced beveled grooves in one end surface thereof, said wear platesections being positioned on said mounting face with said beveledgrooves in facing alignment to form spaced Wedge shaped openings; groovemeans in said mounting face defining a line substantially parallel tosaid end surfaces of said wear plate sections; depending lip portions onthe underside of each of said Wear plate sections extending into saidgroove means; tapered locking means connected to said support member andengaging said beveled grooves to hold said plates to said support andforce said lip means into engagement with said groove means; and holding.means connecting the remote ends of said plate sections to said supportin a manner to permit limited flow of said Wear plate sections on saidmounting face.

6. The jaw structure of claim 5 wherein said locking means and saidholding means are spring biased to resiliently connect said wear platesections to said support.

References Cited in the file of this patent UNITED STATES PATENTS

1. IN A JAW STRUCTURE FOR A CRUSHING MACHINE A SUPPORT MEMBER HAVING AMOUNTING FACE THEREON; A PAIR OF WEAR PLATE SECTIONS POSITIONED ON SAIDMOUNTING FACE AND HAVING SPACED OPPOSITELY BEVELED GROOVES IN THEADJACENT END SURFACES THEREOF, SAID BEVELED GROOVES BEING IN FACINGALIGNMENT TO FORM WEDGE SHAPED OPENINGS; FIRST FLANGE MEANS ON SAIDMOUNTING FACE DEFINING A LINE SUBSTANTIALLY PARALLEL TO SAID ENDSURFACES OF SAID WEAR PLATES; COOPERATING FLANGE MEANS ON EACH OF SAIDWEAR PLATE SECTIONS; AND TAPERED LOCKING MEANS CONNECTED TO SAID SUPPORTMEMBER AND ENGAGING SAID BEVELED GROOVES TO HOLD SAID PLATE SECTIONS TOSAID SUPPORT AND FORCE SAID COOPERATING FLANGE MEANS INTO ENGAGEMENTWITH SAID FIRST FLANGE MEANS.